So the military helicopter they were using is not good for all weather conditions???
I’ll have to speak to a relative of mine who works for the company that makes the Blackhawk helicopter, and see what he makes of the downed Marine copter that couldn’t navigate in the rain storm. I guess it is not so much the rain as the air turbulence you can have in a heavy rain storm. Maybe.
CH53E is a heavy-lift copter with 3(?) engines. Not seemingly a delicate flower, though it does seem to be high maintenance like most helicopters. Interesting to hear what someone familiar with them says.